Add handling for missing nvml lib

app/.clang-format

@@ -0,0 +1 @@
+BasedOnStyle: Google

app/CMakeLists.txt

@@ -4,15 +4,29 @@ project(fantasize VERSION 0.1.7)
 
 set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
 
-find_package(nlohmann_json 3.11.2 REQUIRED)
+find_package(nlohmann_json 3.7 REQUIRED)
 find_package(Boost 1.80 COMPONENTS program_options log log_setup date_time REQUIRED)
 
+find_library(NVML_LIB nvidia-ml)
+
+set(ADDITIONAL_LIBS)
+
+if (NVML_LIB)
+    set(HAVE_NVML)
+
+    add_library(nvidia-sensor-lib STATIC
+      src/sensor/NvidiaSensor.cxx
+      src/sensor/GPUSensorsFacade.cxx)
+
+    target_link_libraries(nvidia-sensor-lib PUBLIC NVML_LIB)
+
+    list(APPEND ADDITIONAL_LIBS nvidia-sensor-lib)
+endif()
+
 add_executable(${PROJECT_NAME}
   src/main.cxx
   src/sensor/LMSensorsFacade.cxx
-  src/sensor/GPUSensorsFacade.cxx
   src/sensor/Sensor.cxx
-  src/sensor/NvidiaSensor.cxx
   src/sensor/LMSensor.cxx
   src/pwm/PWMControl.cxx
   src/pwm/PWMControlFacade.cxx
@@ -30,7 +44,8 @@ add_executable(${PROJECT_NAME}
 set_property(TARGET ${PROJECT_NAME} PROPERTY CXX_STANDARD 20)
 
 target_include_directories(${PROJECT_NAME} PUBLIC include /opt/cuda)
-target_link_libraries(${PROJECT_NAME} PUBLIC sensors nvidia-ml nlohmann_json::nlohmann_json tbb ${Boost_LIBRARIES})
+
+target_link_libraries(${PROJECT_NAME} PUBLIC sensors nlohmann_json::nlohmann_json tbb ${Boost_LIBRARIES} ${ADDITIONAL_LIBS})
 
 install(TARGETS ${PROJECT_NAME} DESTINATION usr/local/bin)
 install(FILES ${CMAKE_CURRENT_SOURCE_DIR}/unit/fantasize.service DESTINATION usr/lib/systemd/system)

app/src/fan/FanCurve.cxx

@@ -1,10 +1,9 @@
-#include <boost/log/attributes/named_scope.hpp>
-#include <iostream>
-
-#include <boost/log/trivial.hpp>
-
 #include <fan/FanCurve.h>
 
+#include <boost/log/attributes/named_scope.hpp>
+#include <boost/log/trivial.hpp>
+#include <sstream>
+
 using namespace std;
 
 FanCurve::FanCurve(std::vector<FanStep> steps,

app/src/sensor/NvidiaSensor.cxx

@@ -1,8 +1,10 @@
-#include <boost/json/object.hpp>
-#include <include/nvml.h>
+#ifdef HAVE_NVML
 
+#include <include/nvml.h>
 #include <sensor/NvidiaSensor.h>
 
+#include <boost/json/object.hpp>
+
 using namespace std;
 
 NvidiaSensor::NvidiaSensor() { nvmlInit_v2(); }
@@ -25,3 +27,5 @@ json NvidiaSensor::toJson() const {
   json obj = {"NvidiaSensor", toString()};
   return obj;
 }
+
+#endif

app/src/sensor/SensorManager.cxx

@@ -3,20 +3,26 @@
 using namespace std;
 
 SensorManager::SensorManager()
-    : mLMSensorsFacade(make_unique<LMSensorsFacade>()),
-      mGPUSensorsFacade(make_unique<GPUSensorsFacade>()) {}
-
-vector<shared_ptr<Sensor>> SensorManager::TemperatureSensors() {
-  vector<shared_ptr<Sensor>> tempSensors;
-
-  tempSensors = mLMSensorsFacade->TemperatureSensors();
-
-  auto gpuSensors = mGPUSensorsFacade->TemperatureSensors();
-  tempSensors.insert(tempSensors.end(), gpuSensors.begin(), gpuSensors.end());
-
-  return tempSensors;
+    : mLMSensorsFacade(make_unique<LMSensorsFacade>())
+    , mGPUSensorsFacade(make_unique<GPUSensorsFacade>())
+{
 }
 
-vector<shared_ptr<Sensor>> SensorManager::RPMSensors() {
-  return mLMSensorsFacade->RPMSensors();
+vector<shared_ptr<Sensor>> SensorManager::TemperatureSensors()
+{
+    vector<shared_ptr<Sensor>> tempSensors;
+
+    tempSensors = mLMSensorsFacade->TemperatureSensors();
+
+#ifdef HAVE_NVML
+    auto gpuSensors = mGPUSensorsFacade->TemperatureSensors();
+    tempSensors.insert(tempSensors.end(), gpuSensors.begin(), gpuSensors.end());
+#endif
+
+    return tempSensors;
+}
+
+vector<shared_ptr<Sensor>> SensorManager::RPMSensors()
+{
+    return mLMSensorsFacade->RPMSensors();
 }